Young 'It' stars wanted to be pen pals with Bill Hader and James McAvoy. Here's why the 'Chapter Two' adult actors refused to write back.

At the urging of their acting coach, the seven young actors who starred as the Loser's Club in the 2017 horror mega-hit It sent mementos to the actors cast to play their older selves in the sequel, It Chapter Two.

"We wrote them letters from our characters' perspectives, just [about] how we wanted to be when we were older," explained Chosen Jacobs, who plays the young Mike Hanlon (watch above). "Just so they could look back on it and remember who the character is and what they hoped for, and see if they became that or not, and just draw inspiration from that."

“And they gave us a framed picture of them," added Andy Bean, who plays the grown-up Stanley Uris.

So how did the adult actors react to the sweet gestures? Not as gratefully as you’d think (we’re looking at you, Bill Hader).

"They're very young [in the photos], which is a weird thing to give to a grown man," said Hader, who plays the adult Richie Tozier. "I can't have some strange kid framed in my house." (The strange kid Hader is referring to is Stranger Things breakout Finn Wolfhard, who plays the young Richie.)

Turns out the elder cast members were not very good pen pals.

"No," Hader and co-star James Ransone shot back defiantly when asked if they wrote their younger counterparts back, with Hader adding, "I'm an adult. Why would I do that?"